Instead of requesting GPON fibre, request P2P fibre. Then get a Bitstream service on that.
While I don't agree with Chorus' method of "pay us to build our network that we will profit off going forward" you can certainly understand from a business perspective why they would do this for a location like this.
So the option is, as you say, wait for it to happen. Or just get Inspire to build their fibre to you. Inspire have always been on the side of "get fibre wherever we can and make money off it later" as opposed to the Chorus method.